tutorial5UpdateDMLOperation

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//fetch the invoices created today, Note, you must have at least one invoice created today
List<apex_invoice__c> invoiceList = [SELECT id, Name, APEX_Status__c, createdDate FROM APEX_Invoice__c];

//create List to hold the updated invoice records
List<apex_invoice__c> updatedInvoiceList = new List<apex_invoice__c>();
for (APEX_Invoice__c objInvoice: invoiceList) {
		if (objInvoice.APEX_Status__c !='Paid') {
			objInvoice.APEX_Status__c = 'Paid';
			updatedInvoiceList.add(objInvoice);
		}
	
}

//DML Statement to update the invoice status
update updatedInvoiceList;

//Prints the value of updated invoices
System.debug('List has been updated and updated value of records are'+updatedInvoiceList);